Infrared detector

Abstract

Abstract PURPOSE:To improve the yield of a product and to prevent deterioration due to vibration and heat cycle by screwing and fitting a base, to which an infrared detecting element is welded, through a cooling block with an interposed soft metal. CONSTITUTION:An infrared detecting element 7 is welded to a base 6 with In solder 13. On the reverse side of the base 6, a male screw 11 is provided, and an In film is interposed between the male screw 11 and a famele screw 12 provided to a cooling block 3, fixing the screws 11 and 12 together. The cooling block 3 is brazed to metallic Kovar 2 to form an internal cylinder together with internal cylinder glass 1, and a glass pipe 9 forming an external cylinder is welded, with an infrared-ray transmission window 8 facing to the detecting element 7, by using metallic Kovar materials 4 and 5 for sealing. An electric signal is led out via parts (a), (b), (c), and (x) and Kovar materials 2, (d) and Y. The internal cylinder contains a cooling liquid (l). Consequently, the yield of products is improved and secular deterioration due to vibration and heat cycles is prevented.

Inventors

• 👤 Takaaki Onoe

Bibliographic Details